*{
  margin: 0;
  padding: 0;
}
.lunbo {
  list-style: none;
  margin-left: 100px;
  margin-top: 20px;
  margin-bottom: 20px;
  width: 1250px;
  height: 680px;
  position: relative;
  overflow: hidden;
  border-radius: 30px;
  border: 10px #fff solid;
  box-shadow: 20px 30px 20px rgba(0, 0, 0, 0.5);
}
.images {
  width: 300%;
  height: 100%;
  display: flex;
  position: absolute;
  left: 0;
  transition: 1s;
}
.img{
  width: 100%;
  background-size: cover;
}
.img:nth-child(1){
  background-image: url("../img/lunbo1.jpg");
}
.img:nth-child(2){
  background-image: url("../img/lunbo2.jpg");
}
.img:nth-child(3){
  background-image: url("../img/lunbo3.jpg");
}
.min-images {
  display: flex;
  justify-content: space-evenly;
  position: absolute;
  bottom: 20px;
  width: 40%;
  z-index: 100;
  right: 10%;
}
.min{
  list-style: none;
  width: 60px;
  height: 60px;
  cursor: pointer;
  border-radius: 50%;
  background-size: cover;
  border: 5px solid rgba(255, 255, 255, 0.5);
}
.min:nth-child(1){
  background-image: url("../img/lunbo1.jpg");
}
.min:nth-child(2){
  background-image: url("../img/lunbo2.jpg");
}
.min:nth-child(3){
  background-image: url("../img/lunbo3.jpg");
}
.button {
  width: 100%;
  height: 100%;
  position:absolute;
  display: flex;
  justify-content: space-between;
  user-select:none;
}
.button-left,
.button-right {
  font-size: 50px;
  background-color: rgba(255, 255, 255, 0.5);
  padding: 0 20px;
  cursor: pointer;
  line-height: 680px;
}